Import Illumination LED bar fix by @Agontuk

Reference: http://forum.xda-developers.com/xperia-u/general/xu-illumination-bar-fix-t2783675
Update kumquat-vendor-blobs.mk
Rename lights.st-ericsson to lights.montblanc

A little hack to replace the source built CM light HAL
with Sony prebuilt module. Hopefully it'll work fine.